|Went to start cleaning up the missing chests in Great Cave Offensive. I'm missing 9 total. A few in area 3, and a few in area 4.|
This one in area 3 with the cannon ignition underwater, that had me stumped for quite a while, I almost had to resort to a guide, but then I tried bringing a fire ability partner with me and it turns out they can breathe fire underwater.
Most of the treasures in area 4 that I missed are very easy to find, it's just that I happened to go to the door that lead to the final boss and looped around to the beginning before fully exploring that area... However, the 3rd treasure chest in area 4 still has me completely stumped. I've been everywhere, several times, and I have no clue where it could be... oh, it's actually just a floor you have to drop through, that looks slightly different from the rest of the floor... and it does kinda look like there might've been something there now that I look at it.